An update to this thread.
I received the visiontac gps receiver. It came with a wall charger, car charger, and a battery backup emergency charger. The unitnitself is about the size of a zippo lighter. Using roqybt, I was able to sync it up to the iPad with no problem.
The one drawback is that MotionX Drive will not download to a non 3G iPad. I ended up buying Navigon, which I found to have a more robust, if not more cluttered interface. The price point made me pause, but in the end I am extremely pleased.